<template>
    <div>
        <div class="search">
            <input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音">
        </div>
        <div class="search-content" ref='search' v-show='keyword'>
            <ul>
                <li 
                class="search-item border-bottom" 
                v-for="item of list" 
                :key="item.id"
                @click='handleCityClick(item.name)'
                >{{item.name}}</li>
                <li class="search-item border-bottom" v-show="hasNoData">
                    没有找到匹配数据
                </li>
            </ul>
        </div>
    </div>
    
</template>
<script>
import Bscroll from "better-scroll"
import { mapMutations } from 'vuex'
export default {
    name:'CitySearch',
    props:{
        cities:Object
    },
    data () {
        return {
            keyword:'',
            list:[],
            timer: null
        }
    },
    methods:{
        // handleCityClick(city){
        //     this.$store.commit("changeCi",city);
        //     this.$router.push('/')
        // },
        handleCityClick(city){
            this.changeCi(city)
            this.$router.push('/')
        },
        // 映射给changeCi 方法
        ...mapMutations(['changeCi'])
    },
    computed:{
        hasNoData() {
            return !this.list.length
        }
    },
    watch:{
        keyword () {
            if(this.timer){
                clearTimeout(this.timer)
            }
            if(!this.keyword.trim()){
                this.list = []
                return
            }
            this.timer = setTimeout(() => {
                const result = []
                for(let i in this.cities){
                    this.cities[i].forEach((value) =>{
                        if(value.spell.indexOf(this.keyword.trim()) > -1 || 
                        value.name.indexOf(this.keyword.trim()) > -1){
                           result.push(value) 
                        }
                    })
                }
                this.list = result
            },100)

        }
    },
    mounted(){
        // 搜索列表较多 可以局部设置滚动
        this.scroll = new Bscroll(this.$refs.search,{click:true})
    }
}
</script>
<style scoped lang="stylus">
@import "~styles/varibles.styl"
.search 
    height:.72rem
    padding: 0 .1rem
    background:$bgColor
    z-index:99
    .search-input
        box-sizing:border-box
        width:100%
        height:.62rem
        line-height: .62rem
        text-align:center
        border-radius: .06rem
        color:#666
        padding:0 .1rem
.search-content
    z-index:1
    overflow:hidden
    position:absolute
    top:1.58rem
    left:0
    right:0
    bottom:0
    background:#eee
    .search-item
        line-height:.62rem
        padding-left:.2rem
        background:#fff
        color:#666


</style>
